Expanding reamer



Apr. 117, H92. mmm@ P. MILLER EXPANDI NG BEAMER Filed Nov. 23, 1922 1 ENTo M M EY g" 5 ti) w AT'ToREM lil Patented Apr. il?, 1923..

PAUL MILLER, 0F PHILADELPHIA, PENNSYLVANIA.

nxranmne unanime.

Application led November 23, 1922. Serial No. 602,917.

T o all whom it may concern.'

Be it known that ll, PAUL MILLER, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in @EX- panding Reamers, of which the following 1s a specification.

My invention reamers.

The object is to provide a tool of the character described capable ofbeing made in different sizes, and including comparatively few parts, it being easyto construct, accurate and effective in operation, and durrelates to expanding able'and perfectly rigid when the parts com-A posing it are assembled and locked together.`

lln the accompanying drawings Pig. 1 is a view in side elevation, partly in section;

F ig. 2 is a transverse section on the line 2-2 of Fig. 1;

Fig. 3 is a view of the body in longitudinal section;

Fig. 4 is a view of the lock nut;

Fig. 5 is a view ofthe round steel plate for supporting the outer end, of the centering rod;

Fig. l6 is a view of the round nut;

ig. 7 is a view of the cones;

Pig. 8 is a view of one of the blades;

Fig. 9 is a view of the hand-operated arbor.

A, represents the body ofthe tool. rihis is preferably made of steel with a taper 1 at one end, and 2, at the other, and having two cylindrical portions 3 and l of different diameters, and between them the shoulder 5, all constituting the bore of the tool through its longitudinal or axial center.

B, represents aM/eenter guiding rod having threads and Zat its QPPosite ends, and the cylindrical portion 8 adjacent to the threads 7, and of a size to fit snugly the cylindrical bore portion 3 of the body A of the tool, as shown in Fig. 1. One side of this collar 8 is grooved or flattened as at 9 to receive the screw 10 which turns in the threads 11 in the side of the tool, and extends to the fiat or thebottom of the groove 9 to hold the rod rigidly inplace in the actual center of the bore of the body of the tool. Une or more tapering cones C and C2 (two being shown) are bored to fit the center guidingbar B to adjust the blades D from the center.

It is obvious that any number of blades might be employed, Radial grooves 12 are provided for them, (which grooves the blades accurately fit), their inner edges 13 sloping diagonally to tapering surfaces of the cones. Against these inner edges 13 the cones bear, so that as the cones are moved inwardly along the center uiding-rod B, the blades are forced outwardly simultaneously, with precision, all of them the same distance, and uniformly from end to end. Y

The construction of these tapering cones and the other parts of the tool are such that it is possible to expand the blades D' to any required size, for example, from one inch and more, to two and one-half inches, to an adjlillstment of one-thousandth part of an inc The cones C and C2 are moved inwardly on the center guiding-rod by a round nut 14 havin a threaded hole 15 at the center, and two oles 16 at the sides to receive a tool for turning the same.

The extreme outery end '17 of the center guiding rod is supported in the center hole 18 of the round steel plate 19. rll`he periphery of this plate is screw-threaded as at'20, and it is secured in place by inserting the point of a wrench in the hole 2l. This round plate not only holds and supports the outer end of the center guiding rod, but is also employed to tighten the blades D from inside the bodyy A.

ln addition to the round plate 19, the outer threads of which screw into the threads 23 of the body, there are two round nuts 24 and 25, which turn on threads 26 and 27 on the body portion respectively at the opposite ends of the steel blades, their function -being to tighten and hold the blades in the grooves from theirop ositc' ends after they shall have been equal panded and adjusted outwardly.

E, is a shank for the steel body A, it preferably having the two tapering ends 28 and 29 with the threaded socket 30 in the taper 28. The taper 28 fits the taper 2 of the body, and the threads 3() screw on the threaded end 7 of the center guiding rod B, and the radial slots 31 and 32 receive a key for locking the shank and body axiall together, while the set-screws 33 in the body is of similar construction to y exhold the shank rigidly in place.

T he shank F correspond to the' till lll@

'the bore of the shank E, except that the latter, is adapted for th Morse or other taper foi` machine reaming, and shank F has a square end 34 for hand reaming.

It is understood that these reamers may be made in various sizes, and a set of live or six marked from one to tive or six on the bodies will do the work required sixty times the number of tools to do, my present reamer being made to ream any required size hole from one and one-half to eight and one-halt inches in diameter with an adjustment of from onethousandth of an inch upward.

I claim:

1. An expanding reamer including'abody having a bore formed throughout its center, a portion of which is cylindrical, a center guiding rod #having a cylindrical portion which tits and vis held in the cylindrical portion of the bore, and provided with screw-threads at each end, radially adjustable blades, cones slidably mounted on the rod for engaging the inner edges of the blades, and simultaneously adjusting them uniformly throughout their length, a nut screwed on the threads of the rod for adjusting the cones, and a shank having a portion which tits one end of the bore of the body portion and provided with a screwthreaded socket which receives one of the threaded ends of the center guiding rod.l

2. An expanding rea-mer, including a counter-bored body, a portion of which is radially slotted, a portion of the bore cylindrical and a part tapered, a-center guiding rod itted to the cylindrical portion ofthe bore, means for centering and supporting the outer end of the rod with respect tothe body portion, and a shank having a tapered end adapted to fitithe tapered portion of the-body portion and means for securing the adjacent ends of the center guiding rod and the shank together.

3. An expanding reamer includingv la counter-bored radially slotted bodyportion,

' a shank having a portion which extends into the bore of the body portion,.a rod located at the axial center of the bore and secured to the shank, blades fitted to and adjustable in the slots and ghaving tapering inner edges, graduated cones slidably mounted on the ro and engaging the tapering inner edges of the blades, the rod having a screwthieaded outer end, a nut screwed on the threads for movlng the cones in a direction that heretofore it l toward the shank to simultaneously adjust the blades.

4. An expanding reamer including a counterbored radially slotted body portion, one end of the bore tapered, a shank having a tapering end fitted to the tapered bore, a

center guiding rod coinciding with the axial center of the body portion and having one end secured to the contiguous end of the shank, said rod having a threaded outer end, blades fitted to and slidably mounted in the radial slots, means slidably mounted on the center guiding rod for; simultaneously adjusting the blades, and a nut screwed on the threads at the outer end of the rod for forcing said slidable means end-y wise thereon.

5. An expanding reamer including a counterbored radially slotted body portion, a shank having a portion which extends into one end ot` the bore of the body portion, a center `guiding rod lying coincident. with the axial center of the body portion and secured to the shank, blades fitted to and slidable in the slots and having tapering inner edges, slidably mount@ means on the rod and engaging the inner edges of the blades, and means for adjusting the slidably mounted means on the rod for simultaneously adjusting the blades. j

6.v An expanding reamer including a counter-bored radially slotted body portion, an intermediate portion of the/bore being cylindrical'a-nd one end of the bore gradually tapering from the cylindrical portion to the end, 4a center guiding rod insertable in the bore by Way of said tapering portion of the bore, the guiding rod threaded at eachv on the threads, blades fitted to and adjustable in the slots, elements slidabl mounted on the rod engaging the "inner e es of the blades and adjustable on the rod by the turning of the nut, and means for centering and supporting the outer end of the rod in the outer end of 'the body, av shank having a tapering end adapted to enter and fit the tapering portion of the bore of the body and having a threaded socket which receives and is screwed to the threaded end of the rod adjacent to the cylindrical part thereof.

In testimony whereof I ailix my si nature.

PAUL MIL 1ER. 

